2026 Virginia Half Triathlon

October 11 | Lake ANna, VA

Registration

All race registrations are completed online. We do not accept paper forms, do not offer race day registrations and do not accept payment from other services like PayPal or Venmo. You may register online by clicking here.

All Double ANVIL athletes (solo and team) are required to have our Medical Release Form signed by a licensed doctor. This form must be submitted to our race director via email one month prior to the race start.

Athletes may download the Medical Release Form here.

Swimmer wearing a gray swim cap and orange goggles practicing freestyle stroke in outdoor water.
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  • Mammoth Endurance Half Triathlon | VA 70.3 | October 11th

Kayaker in a green kayak paddling on a lake with a person swimming nearby.
Sunset over a body of water with two boats in the distance, tall grasses in the foreground, and a leafless tree on the right side
A black star with a smaller star cutout in its center, against a white background.

COURSE INFORMATION - Coming Soon

Our courses consist of shorter loops inside a controlled area. The distance of our events require extra safety measures be taken to ensure athletes are cared for and able to receive medical help if needed while on course. These shorter loops allow for your family or crew to be much more involved in your race, resulting in an overall more enjoyable experience for athletes and their support crew.

The courses are inside a state park and are well marked / manned by volunteers during the event. Try it before you bash it - we guarantee you’ll find the shorter loops helpful and more enjoyable during your event.

A cyclist riding along a shaded country road surrounded by trees with autumn leaves.
A person riding a black bicycle on a paved road, wearing a white helmet, sunglasses, and athletic clothing, with a water bottle attached to the bike frame, and looking at a device in their hands.
A cyclist in a red shirt and helmet riding a black racing bike swiftly on a road, with blurred trees in the background.
A man wearing a white helmet and white long-sleeve shirt riding a red and black bicycle on a paved road surrounded by trees.
A group of swimmers in a body of water with a submerged shark fin visible above the surface.
A woman in biking gear holding an American flag, hugging a tall man with a beard wearing a black hoodie and gloves, at night with a person smiling in the background.
A person standing in water wearing a wetsuit and a swim cap, with mist and trees in the background during sunrise or sunset.
A person swimming in a foggy lake, with only their head and one arm visible above the water.
A river at sunset with a boat and buoys visible on the water, and a forested shoreline in the distance.

Ready to test your limits?

Whether you’re chasing your first ultra or your next finish line, Mammoth Endurance is here to carry you through.

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